rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10490 ticks this GP) idle=e29c/1/0x4000000000000000 softirq=17047/17050 fqs=3995
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   841084          0            0
rcu: 	cputime:    36767      15689           61   ==> 52470(ms)
rcu: 	(t=10502 jiffies g=7969 q=5146 ncpus=2)
CPU: 1 UID: 0 PID: 6703 Comm: syz.0.245 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:debug_object_activate+0x2f7/0x420
Code: c7 45 00 03 00 00 00 48 8b 7c 24 08 48 8b 34 24 e8 1e 04 ac 06 31 ed 65 48 8b 05 c4 26 d0 0d 48 3b 44 24 40 0f 85 bf 00 00 00 <89> e8 48 83 c4 48 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc
RSP: 0018:ffffc900001dff70 EFLAGS: 00000246
RAX: 2ed5da8a30b67000 RBX: ffff88810aa5ed80 RCX: 0000000000000300
RDX: 0000000000000000 RSI: ffffffff8be33660 RDI: 00000000ffffffff
RBP: 0000000000000000 R08: ffffffff8fa38437 R09: 1ffffffff1f47086
R10: dffffc0000000000 R11: fffffbfff1f47087 R12: ffffffff8b8bd3b0
R13: ffff88810710f3b8 R14: dffffc0000000000 R15: 1ffff11020e21e79
FS:  00007f56e57956c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c32f5c7 CR3: 000000004203e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 kvfree_call_rcu+0x4f/0x410
 cfg80211_update_known_bss+0x634/0x1330
 __cfg80211_bss_update+0x147/0x2120
 cfg80211_inform_single_bss_data+0xba9/0x1ac0
 cfg80211_inform_bss_data+0x1fb/0x3b30
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x746/0x9e0
 ieee80211_scan_rx+0x593/0xa20
 ieee80211_rx_list+0x201c/0x2a90
 ieee80211_rx_napi+0x1a8/0x3d0
 ieee80211_handle_queued_frames+0xe8/0x1f0
 tasklet_action_common+0x36c/0x580
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:strlen+0x2e/0x70
Code: 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89
RSP: 0018:ffffc900065c7138 EFLAGS: 00000a07
RAX: 0000000000000006 RBX: ffffffff8b8bd2ac RCX: 000000008b8bd203
RDX: ffffffff822bd0b4 RSI: ffffffff8e139ee0 RDI: ffffffff8b8bd2a0
RBP: ffffc900065c7248 R08: ffffffff8fa38437 R09: 1ffffffff1f47086
R10: dffffc0000000000 R11: fffffbfff1f47087 R12: 1ffff92000cb8e34
R13: ffffffff822bd0b4 R14: dffffc0000000000 R15: 000000000000000b
 perf_trace_lock+0xc2/0x3b0
 lock_release+0x3b2/0x3e0
 mod_objcg_mlstate+0x1d3/0x260
 drain_obj_stock+0x196/0x3c0
 refill_obj_stock+0x247/0x850
 obj_cgroup_charge_account+0x116/0x660
 __memcg_slab_post_alloc_hook+0x3e6/0x7f0
 kmem_cache_alloc_lru_noprof+0x2c7/0x3d0
 __d_alloc+0x36/0x7a0
 d_alloc_parallel+0xe5/0x15e0
 __lookup_slow+0x116/0x3d0
 lookup_slow+0x53/0x70
 link_path_walk+0x935/0xea0
 path_openat+0x28c/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f56e498d550
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44
RSP: 002b:00007f56e5794f10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f56e498d550
RDX: 0000000000000002 RSI: 00007f56e5794fa0 RDI: 00000000ffffff9c
RBP: 00007f56e5794fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f56e4bb6038 R14: 00007f56e4bb5fa0 R15: 00007ffcc9c7e5a8
 </TASK>
sched: DL replenish lagged too much
